所需命令如下所示：
1.sudo apt purge libreoffice-common
2.sudo apt purge unity-webapps-common
3.sudo apt purge thunderbird totem rhythmbox empathy brasero simple-scan gnome-mahjongg aisleriot gnome-mines cheese gnome-sudoku transmission-common gnome-orca webbrowser-app landscape-client-ui-install
4.sudo apt purge deja-dup
